Update: Some offers mentioned below are no longer available. View the current offers here.Want to see the latest flight deals as soon as they’re published? Follow The Points Guy on Facebook and Twitter, and subscribe to text message alerts from our deals feed, @tpg_alerts.Airfare deals are typically only available on limited dates. We recommend that you use Google Flights to find dates to fly, then book through an online travel agency, such as Orbitz, which allows you to cancel flights without penalty by 11pm Eastern Time within one day of booking. Remember: Fares may disappear quickly, so book right away and take advantage of Orbitz’s courtesy cancellation if you’re unable to travel. Additionally, keep in mind that discounted partner fares may not earn miles with US-based carriers.The SkyTeam alliance is putting Europe on sale right now from many US cities. We are seeing very low fares from Miami, Philadelphia, Chicago and New York. Destinations include Budapest, Vienna, Dusseldorf and Amsterdam. This appears to be an “attack” on AA hubs, so American might retaliate with low fares from Delta hubs later in the day (Detroit, Atlanta, Minneapolis, etc.).The fares are valid from September through December, with some limited availability continuing on into 2017. Flights can be booked directly on Delta’s site, although you may find cheaper prices by searching on Momondo and then booking with a third-party online travel agency. Many of these trips will earn at least 10,000 Delta MQMs, but you may be better off crediting the miles to a different airline for more redeemable miles since Delta is revenue-based.Airline: Delta, Air France, KLMRoute: US to EuropeCost: $399+ round-trip in economyDates: September 2016 - December 2016Booking Link: ExpediaPay With: Chase Sapphire Reserve, American Express Premier Rewards Gold, Citi Prestige or Chase Sapphire PreferredHere are a few examples of what you can book:Miami (MIA) to Dusseldorf (DUS) for $399 round-trip in November:Miami (MIA) to Dusseldorf (DUS) for $399 round-trip.New York (LGA) to Dusseldorf (DUS) for $409 round-trip in October:Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.New York (LGA) to Dusseldorf (DUS) for $409 round-trip.Chicago (ORD) to Amsterdam (AMS) for $456 round-trip in January:Chicago (ORD) to Amsterdam (AMS) for $456 round-trip.Philadelphia (PHL) to Budapest (BUD) for $420 round-trip in November:Philadelphia (PHL) to Budapest (BUD) for $420 round-trip.Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as the Chase Sapphire Reserve, American Express Premier Rewards Gold or Citi Prestige (3x on airfare) or the Chase Sapphire Preferred Card (2x on all travel purchases). Check out this post for more on maximizing airfare purchases.H/T: The Flight DealFeatured Image courtesy of Shutterstock.If you’re able to score one of these tickets, please share the good news in the comments below!